phptelnet功能实例代码

例子，php telnet功能实现代码。

3. class PHPTelnet {

4. var $show_connect_error=1;

5. var $use_usleep=0; // change to 1 for faster execution

6. // don't change to 1 on Windows servers unless you have PHP 5
7. var $sleeptime=125000;
8. var $loginsleeptime=1000000;

9. var $fp=NULL;

10. var $loginprompt;

11. var $conn1;

12. var $conn2;

13. /*

14. 0 = success
15. 1 = couldn't open network connection
16. 2 = unknown host
17. 3 = login failed
18. 4 = PHP version too low
19. */
20. function Connect($server,$user,$pass) {
21. $rv=0;
22. $vers=explode('.',PHP_VERSION);
23. $needvers=array(4,3,0);
24. $j=count($vers);
25. $k=count($needvers);
26. if ($k<$j) $j=$k;
27. for ($i=0;$i<$j;$i++) {
28. if (($vers[$i]+0)>$needvers[$i]) break;
29. if (($vers[$i]+0)<$needvers[$i]) {
30. $this->ConnectError(4);
31. return 4;
32. }
33. }

34. $this->Disconnect();

35. if (strlen($server)) {

36. if (preg_match('/[^0-9.]/',$server)) {
37. $ip=gethostbyname($server);
38. if ($ip==$server) {
39. $ip='';
40. $rv=2;
41. }
42. } else $ip=$server;
43. } else $ip='127.0.0.1';

44. if (strlen($ip)) {

45. if ($this->fp=fsockopen($ip,23)) {
46. fputs($this->fp,$this->conn1);
47. $this->Sleep();

48. fputs($this->fp,$this->conn2);

49. $this->Sleep();
50. $this->GetResponse($r);
51. $r=explode("\n",$r);
52. $this->loginprompt=$r[count($r)-1];

53. fputs($this->fp,"$user\n");

54. $this->Sleep();

55. fputs($this->fp,"$pass\n");

56. if ($this->use_usleep) usleep($this->loginsleeptime);
57. else sleep(1);
58. $this->GetResponse($r);
59. $r=explode("\n",$r);
60. if (($r[count($r)-1]=='')||($this->loginprompt==$r[count($r)-1])) {
61. $rv=3;
62. $this->Disconnect();
63. }
64. } else $rv=1;
65. }

66. if ($rv) $this->ConnectError($rv);

67. return $rv;
68. }

69. function Disconnect($exit=1) {

70. if ($this->fp) {
71. if ($exit) $this->DoCommand('exit',$junk);
72. fclose($this->fp);
73. $this->fp=NULL;
74. }
75. }

76. function DoCommand($c,&$r) {

77. if ($this->fp) {
78. fputs($this->fp,"$c\n");
79. $this->Sleep();
80. $this->GetResponse($r);
81. $r=preg_replace("/^.*?\n(.*)\n[^\n]*$/","$1",$r);
82. }
83. return $this->fp?1:0;
84. }

85. function GetResponse(&$r) {

86. $r='';
87. do {
88. $r.=fread($this->fp, 1024);
89. $s=socket_get_status($this->fp);
90. } while ($s['unread_bytes']);
91. }

92. function Sleep() {

93. if ($this->use_usleep) usleep($this->sleeptime);
94. else sleep(1);
95. }

96. //telnet功能主函数

97. function PHPTelnet() {
98. $this->conn1=chr(0xFF).chr(0xFB).chr(0x1F).chr(0xFF).chr(0xFB).
99. chr(0x20).chr(0xFF).chr(0xFB).chr(0x18).chr(0xFF).chr(0xFB).
100. chr(0x27).chr(0xFF).chr(0xFD).chr(0x01).chr(0xFF).chr(0xFB).
101. chr(0x03).chr(0xFF).chr(0xFD).chr(0x03).chr(0xFF).chr(0xFC).
102. chr(0x23).chr(0xFF).chr(0xFC).chr(0x24).chr(0xFF).chr(0xFA).
103. chr(0x1F).chr(0x00).chr(0x50).chr(0x00).chr(0x18).chr(0xFF).
104. chr(0xF0).chr(0xFF).chr(0xFA).chr(0x20).chr(0x00).chr(0x33).
105. chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0x2C).chr(0x33).
106. chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0xFF).chr(0xF0).
107. chr(0xFF).chr(0xFA).chr(0x27).chr(0x00).chr(0xFF).chr(0xF0).
108. chr(0xFF).chr(0xFA).chr(0x18).chr(0x00).chr(0x58).chr(0x54).
109. chr(0x45).chr(0x52).chr(0x4D).chr(0xFF).chr(0xF0);
110. $this->conn2=chr(0xFF).chr(0xFC).chr(0x01).chr(0xFF).chr(0xFC).
111. chr(0x22).chr(0xFF).chr(0xFE).chr(0x05).chr(0xFF).chr(0xFC).chr(0x21);
112. }

113. function ConnectError($num) {

114. if ($this->show_connect_error) switch ($num) {
115. case 1: echo '
     [PHP Telnet] Connect failed: Unable to open network connection
     '; break;
116. case 2: echo '
     [PHP Telnet] Connect failed: Unknown host
     '; break;
117. case 3: echo '
     [PHP Telnet] Connect failed: Login failed
     '; break;
118. case 4: echo '
     [PHP Telnet] Connect failed: Your server\'s PHP version is too low for PHP Telnet
     '; break;
119. }
120. }
121. }
122. ?>